javascript - ScrollMagic 补间 : play animation only once going forward

Question

我想知道如何让动画在向下滚动时只播放一次，而在向上滚动时则没有动画。

var controller = new ScrollMagic.Controller();

var tween_1 = TweenMax.to('#obj_1', 0.5, {
    left: '0%', delay: .1
});

var containerScene = new ScrollMagic.Scene({
    triggerElement: '#scene_1',
    offset: -100
})
.setTween(tween_1)
.addIndicators()
.addTo(controller);

Answer 1

实际上非常简单，您将 reverse:false 设置为选项，如下所示:

var controller = new ScrollMagic.Controller();

var tween_1 = TweenMax.to('#obj_1', 0.5, {
     left: '0%', delay: .1
});

var containerScene = new ScrollMagic.Scene({
     triggerElement: '#scene_1',
     offset: -100,
     reverse:false
})
.setTween(tween_1)
.addIndicators()
.addTo(controller);